writing assignment II

writing assignment II - very well Through a transfusion of...

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Chris Cefalo February 17, 2008 Professor O’Connor Writing Assignment II For older people, muscle tissue does not heal very well. On the other hand, younger muscle tissue heals much better. There is new research being done about why this is. They suggest that these older cells still posses their healing ability however their ability is almost switched off. An experiment was done in 2003 on animals to find out why older cells heal so much worse than younger cells. They found that the stem cells in the younger muscle tissue “increased expression of a surface protein (Delta),” yet the older tissue did not. They then found out that it was possible to force the older muscle tissue to “express the surface protein (Delta)” by exposing them to younger blood. To test this hypothesis, young and old mice were studied. As expected, the younger mice repaired their muscle tissue normally while the older mice didn’t repair it
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Unformatted text preview: very well. Through a transfusion of blood between the younger mice and the older mice, they saw a great increase in muscle repair. The older mice’s stem cells located in the muscle tissue actually started to heal the muscle. These results suggest that the younger blood almost rejuvenates the older muscle stem cells and helps them repair muscle much better. This experiment could be a scientific breakthrough. It can be used as therapy for aging and aching muscle. For muscles about 30 to 80 years old this is great news since muscle loss associated with age impairs mobility and effects 25 % of senior citizens. Now, people who are older don’t have to go through the aching and the pain of doing things they used to do when they were younger. Works Cited: David Secko, Canadian Medical Association Journal.Vol.172, Iss. 7; pg. 869, March 2005....
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